In the given circuit the internal resistance of the 18 V cell is negligible. If R1 = 400W, R3 = 100 W and R4 = 500 W and the reading of an ideal voltmeter across R4 is 5 V, then the value of R2 will be:

Question:

In the given circuit the internal resistance of the $18 \mathrm{~V}$ cell is negligible. If $R_{1}=400 \Omega, R_{3}=100 \Omega$ and $R_{4}=500 \Omega$ and the reading of an ideal voltmeter across $\mathrm{R}_{4}$ is $5 \mathrm{~V}$, then the value of $R_{2}$ will be:

  1. $300 \mathrm{~W}$

  2. $450 \mathrm{~W}$

  3. $550 \mathrm{~W}$

  4. $230 \mathrm{~W}$


Correct Option: 1

Solution:

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